Flame King Refillable 1 lb. Propane Cylinders | How long to refill?

How long do you have to run the propane to fill a Flame King 1 lb. Refillable Propane Cylinder? It seems like it takes a longer time than you might expect. But it isn't really all that long. Before setting off for Muskegon State Park we have to fill three out of our five refillable cylinders (the other two are still filled from our last trip). No timelapse here, this shows how long you have to wait for each to fill.

0:00 Intro
1:18 The refill system
2:10 Setting it up
3:10 The first cylinder (not on tight enough)
7:20 The second cylinder
10:24 The third and final cylinder
13:08 And that's all there is to it